The Rorty R11 Stiletto single-seater buggy

[Rorty]

What I was referring to was the overall ratio and not the FNR internal ratio, which upon reflection (I was thinking of the shorter tyres), with the specified 31" tall tyres, would be closer to 7:1. Check out what size engine sprockets are available for the Aprillia first and then have a chat with Dan.

I agree, 100 MPH is plenty for one of these cars and you'll seldom even make that....no matter what your buddies say!

[K-fab]

I think 7:1 is going to be too short - you won't have any use for 2nd or maybe even 3rd. (If it's a 6 speed).

If you can overdrive the input shaft it might let you use the 7:1, but just from what I've seen Jay use in the Coyotes, with a Busa power plant, the lower ratios offered by Dan will let the engine be more flexible and make the bike tranny be "wider" if you will. *It will allow you to use the first couple of gears.

Jay started out with a higher ratio box and finally ended up working down to the 4.6 (or 4.??) before the engine was usable. *Since I would believe the Aprilla to have equal if not more torque than the Busa, the lower ratio tranny will be better.

As you've pointed out, this is probably a good question to toss at Danno.

[Rorty]

Don't forget this is a track car and acceleration is the goal and not top speed. First gear would ideally be a "pits & trailer" gear. Second gear then becomes "first" and there's no danger of grabbing neutral on the way from actual first to actual second.

If the car isn't going to be used as a track car, then a lower ratio would be more suitable for wider ratios and general driving in the desert and dunes with higher overall speeds.

[Kludge]

As for the rest, I'll have to get back to you because all the other info is on my workstation. It's Saturday morning here and I haven't fired it up yet! Feel free to remind me if I forget.

Hi Rorty,
Have you had any time to ponder my questions on the R11 and R16 weights (thank you for the info you had right away)

/Frank

[Rorty]

Thanks, I had forgotten. The R11 chassis including all brackets, A-arms, rack, nerf bars etc. is as close to 380 lbs as makes little difference. The four shocks I'm guessing weigh close to 75 lbs and you could add to that another 15 lbs for the major fasteners.